you seem to be on a plateau with your powder charge. in my experience with that powder (h110), increasing the charge will not increase velocity (and may even reduce it) for a grain or two. increasing the charge further will then greatly increase velocity and the cases will start to stick. I...
I keep my loads within reloading manual guidelines. There are other powders, but I don't think better powders for this application.
Sticking cases, in that gun, won't happen until way above max pressures. I would not use this as a proxy for overpressure.
i hike a lot. this is my edc and what I carried yesterday on my hike:
18 rounds of 68 gn xtreme defender. i can't even tell it is in my pocket.
I also carry my 45 cal Blackhawk loaded with 325 gn hard cast when, for example, tent camping in yellowstone n. p.
no primer swipe from the breach face; a primer flow ring around the firing pin strike dent; still a decent moat (for lack of a better term) around the primer; 19 fps extreme spread. nice load!
I wouldn't go any higher with that powder charge, though,
I put a heavy (21pound) spring and a alphawolf barrel in my g30. I run a 265 grain lswc @890 fps for a "bear" load. I don't want to add a "bear caliber" when I can do this in stead. this load is just above 45acp +p pressures and, with the above load, is my 10mm substitute.
didn't see your pics till now. the crimp is good. Just make sure the case wall is not bulged out. you can run your calipers up and down the case to check for an even diameter.
keep us posted on your progress,
p.s. you will know your crimp is too heavy when little rings of brass...